Intermittent-grip device.



.T. GALKINS & P. RICE.

V INTERMITTENT GRIP DEVICE.

APPLICATION FILED JUNE 1, 1911.

' Patented 581113.17, 1912. 2 SHEETS- SHBEI 1. IQ T E WITNESSES *A/ 7. m

ATTORNEYS I. OALKINS & P. RICE.

'INTERMITTENT GRIP DEVICE.

APPLICATION FILED JUNE 1, 1911.

Patented Sept. 17,1912.

2 SHEETS-SHEET 2.

t/("z/nar 6264/66/14" Fran/0 ft (6% rinrrnn learn 1 Flu JAMES CALKINS AND FRANK RICE, GT1" PORT HIIBON, MICHIGAN.

INTERMITTENELGRIP DEVICE.

Speoificatidn of Letters ratentl Patented Sept. 17,1912.

To all whom it may concern;

Be it known that we, JAMns CALK Ns and FRANK RICE, both citizens of the United States, and residents of Port Huron, in the county of St. Clair and State of Michigan, have invented a new and Improved Intermittent-Grip Device, of which the following is a full, clear, and exact description.

' a new and improved mechanism, which is simple and durable iii-construction, easily manipulated and arranged to quickly and positively turn the engine shaft-without much physical exertion on the part of the operator or injury to the operator in case of back firing. i

For the purpose mentioned, use is made of a manuallycontrolled lever, carrying spring-pressed" pawls engaging concentric gear wheels geared together by an intermediate gear wheel, the concentric gear wheels being secured on a shaft, and a springpresscd clutch'mechanism connecting one of the said gear wheels with the said shaft, so that when the lever is actuated the said shaft is driven continually in one direction;

A practical embodiment of the invention is represented in the accompanying drawing'si orming a part of this specification in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 isa sectional. plan view of the engine-starting mechanism connected with an engine shaft; Fig. 2 is a sectional elevation of the same on the line E -2 of Fig 1.

The shaft A to be driven is journaled in suitable bearings B and B which may be attached to orform part of the frame of the engine, and on the said shaft A are loosely mounted a gear wheel C and an internal gear wheel I), connected with each other by an intermediate gear wheel journaled on a stud E attached to the bearing B. On

the hub C of the gear wheel C is fulcrumed,

an actuating lever F pivotally connected by a link G with an angular arm ll of a hand lever H under the control of the operator, and fulcrumed at H on a suitable fixed support On the actuating lever F are fulcrumed spring-pressedpawls I and l in Application filed June 1, 2911, serial No. 630,567.

engagement with the teeth of the gear wheels 0 and i), so that whenthe operator imparts a forward and backward swinging motion to the hand lever H, then an up and down swinging motion is given to the actuat-ing lever, F. The gear wheel D is provided on its hub with a clutch member D engaging a clutch-member J fastened by a key J to the shaft A, and mounted to slide length- 55 wise on the shaft A and against the tension oi: a spring is held in a cap K" screwing; on a threaded sleeve K mounted on the shaft A, the cap being held in place by lock nutK screwing on the sleeve K Bvthe 7o arrangement described the tension of. the spring K can be adjusted to hold the clutch members J and D in mesh during'nc'ranking, but. to allow the said-clutch members toseparate in case of back fire.

From the foregoing it will be seen that by the arrangement described, the operator on imparting a swinging motion to the hand lever I-I causes a continuous rotary motion of the shaft- A in the direction of so the arrow 6. On the shaft A is secured a sprocket wheel L connected by a sprocket chain L with a sprocket wheel L mounted to rotate loosely on the engine'shaft N and adapted to slide thereon in the direction of the said shaft. The hub of the sprocket wheel L is provided with a ciutchnieniber L adapted to engage ajcorrespondingclutch member 0 secured on the-engine shaft N,

and the said sprocket wheel L is provided with an annular grooveL engagedby a shifting lever P fulcriu'ned at P on the engine frame and pressed on by a spring Q,

to normally hold the clutch member L out ioif engagement with the clutch meinber O.

The shifting lever P is pivotally connected by a link it with a pedal S, under the control of theoperator, to permit the latter to impart a swinging motion to the shifting lever P with a view to shift the sprocket wheel L to engage the clutch member L with the clutch member 0. Thus when the shaft A is rotated in the direction of the arrow 3) by the operator manipulating the lever H, as

previously explained, then a rotary motion 1 is transmitted by the sprocket wheel L, chain L, sprocket wheel l1", clutch members L" and O to the engine shaft N to rotate the latter in the direction of the arrow 0 with a view to start the engine. When the operator re- 11o leases the pedal S then the spring Q acts on. the shifting lever P so that the latter moves I when the operator manipulates the lever H the Sprocket Wheel L? away from the clutch incmber 0, thus disengaging the clutch member L from the clutch mcmber'O.

The engaging teeth of the clutch members D and J are cut, as shown, to slant in both directions so that these clutch members maybe forced to'give Way from one another, under tension of spring K, by relative movement in either direction. It will be readily seen that when the engine starts, in the direction of arrow 0, clutch member 0 Will slide freely over the clutch member L ()n the other hand, When the engine backfires in the direction inverse to arrow 0', the pawls I and I will lock the gears from revolution, and thus the clutch members D and J willbe forced to give way.

From the foregoing it will be seen that by hand and presses the treadle S with the foot, and back-firing takes place, then no injury lS lDfllCtOd on the operator, as the E englnestartingmechanism \Vlll remain dormant during the rotating of the engine shaft- N in the 1nverse d1rect1on of the arrow c. It is understood that the lever F may be extended and actuated directly Without .claim as new and desire to secure by Letters Patent:

The combination of a shaft to be driven, a gear wl1eel on said shaft, an internally geared ring journaled on said shaft and extending around the said gear Wheel,- a second gear wheel connecting said first gearivheel and said geared ring, an operating lever, and paWls mounted on said lever in the space between said first gear-Wheel and said geared ring and engaging the same in relativelyfopposite directions.

In testimony whereof We have signed our names to this specification in the presence of two subscribing Witnesses. i

JAMES CALKINS. FRANK RICE.

\Vitnesses:

ALBERT P. RYAN, FRED B; BROWN.

Copies of this patent may be obtained for five cents each, by addressing the 1 Commissioner of Patents.

Washington, D. C. 

